A reverse transcription-polymerase chain reaction assay was developed to detect of avian pneumovirus (Colorado strain) (APV-Col). The specific primers were designed from the published sequence of the matrix protein gene of APV-Col. The primers amplified a product of 631 nucleotides from APV-Col. The...

An enteric disease of young turkeys, referred to as stunting syndrome (SS), causes reduced growth and impaired feed efficiency. A recently isolated virus, stunting syndrome agent, (SSA) has been found to be the etiologic agent of SS. The objective of the present study was to determine relatedness of...

A colorimetric assay employing MTT (3-[4,5-dimethylthiazole-2-yl], 2-5-diphenyltetrazolium bromide) was used to determine the mitogenic response of intestinal intraepithelial lymphocytes (i-IELs) of chickens to T- and B-cell mitogens. Comparisons between mitogenic responses of i-IELs and peripheral ...

Mitogenic responsiveness of intestinal intraepithelial lymphocytes (i-IEL) to concanavalin A (Con A), phytohemagglutinin P (PHA-P), and lipopolysaccharide (LPS) from Salmonella typhimurium were evaluated in various age groups of turkeys by a colorimetric blastogenic microassay. Comparisons were made...

A field trial was conducted to measure differences in performance between selenium-supplemented and nonsupplemented heifers on a 1200-cow California dairy. 117 19- to 27-month-old Holstein heifers were randomly assigned to treatment (n = 59) and control (n = 58) groups. A federally approved, commerc...

The intestinal tracts of ringneck pheasant chicks inoculated with group D rotavirus at 8 days old, were examined PM by light and electron microscopy at 4, 7 or 11 after inoculation. After 4 days, 2 (66%) of 3 birds were stunted and had diarrhoea and dilated intestines. Intestinal villi were shortene...

CmeABC, a multidrug efflux system in Campylobacter jejuni, plays an important role in the resistance to different antimicrobials and toxic compounds. Although this efflux system has been well characterized in C. jejuni and to a less extent in C. coli, it is unknown if CmeABC homologs are functional ...

In 2 experiments using mixed sex or male only chickens, the influence of dietary supplementation with Streptococcus faecium was studied. In a randomized block design with 4 replicates S. faecium was given alone for 21, 36 or 44 days, with S. faecium given in water for 44 days, S. faecium given for 4...

Studies were performed to determine if passive immunization with hyperimmune sera generated to specific Newcastle disease virus (NDV) proteins conferred protection against virus challenge. Six groups of 3-wk-old chickens were passively immunized with antiserum against either hemagglutinin-neuraminid...